Move to cppcheck 2.7 and bump default threads to 2

.github/workflows/build.yml

@@ -127,7 +127,7 @@ jobs:
       CC: gcc
       # This is required to use a version of cppcheck other than that
       # supplied with the operating system
-      CPPCHECK_VER: 2.6
+      CPPCHECK_VER: 2.7
       CPPCHECK_REPO: https://github.com/danmar/cppcheck.git
     steps:
       # This is currently the only way to get a version into

scripts/run_cppcheck.sh

@@ -48,7 +48,7 @@ fi
 
 # Any options/directories specified?
 if [ $# -eq 0 ]; then
-    set -- .
+    set -- -j 2 .
 fi
 
 # Display the cppcheck version and command for debugging